3D caption display method and 3D display apparatus for implementing the same

A three-dimensional (3D) display apparatus comprising:

• a display screen;
• a signal receiving unit for receiving a broadcast signal containing caption data;
• a caption decoding unit for obtaining a 3D parameter command from the caption data;
• and
• a processing unit for processing the 3D parameter command for displaying a 3D caption on a specific caption window of multiple possible caption windows in the display screen,
• wherein the 3D parameter command includes disparity data and a caption window ID,
• wherein the caption window ID identifies a window ID of the specific caption window in the corresponding service for which the disparity data is being given,
• wherein the disparity data is applied to the specific caption window identified in the caption window ID, and
• wherein the specific caption window is moved over time based on the disparity data.

A method for transmitting three dimensional (3D) caption to a 3D display apparatus, the method comprising:

• encoding a broadcast signal containing caption data;
• and
• transmitting, to a receiver, the caption data that includes a 3D parameter command such that the 3D parameter command is processed for displaying a 3D caption on a specific caption window of multiple possible caption windows,
• wherein the 3D parameter command includes disparity data and a caption window ID,
• wherein the caption window ID identifies a window ID of the specific caption window in the corresponding service for which the disparity data is being given,
• wherein the disparity data is applied to the caption window identified in the window ID, and
• wherein the specific caption window is moved over time based on the disparity data.

A apparatus for transmitting three dimensional (3D) caption, the apparatus comprising:

• means adapted for encoding a broadcast signal containing caption data;
• and
• means adapted for transmitting, to a receiver, the caption data that includes a 3D parameter command such that the 3D parameter command is processed for displaying a 3D caption on a specific caption window of multiple possible caption windows,
• wherein the 3D parameter command includes disparity data and a caption window ID, and
• wherein the caption window ID identifies a window ID of the specific caption window in the corresponding service for which the disparity data is being given, and
• wherein the disparity data is applied to the caption window identified in the window ID, and
• wherein the specific caption window is moved over time based on the disparity data.